Bump nuget group + switch tests to Microsoft Testing Platform (MTP) (#8)

* Bump the nuget group with 5 updates

Bumps BenchmarkDotNet from 0.13.6 to 0.15.8
Bumps FsCheck.Xunit from 2.16.6 to 3.3.2
Bumps Microsoft.NET.Test.Sdk from 17.12.0 to 18.4.0
Bumps xunit from 2.9.2 to 2.9.3
Bumps xunit.runner.visualstudio from 2.8.2 to 3.1.5

---
updated-dependencies:
- dependency-name: BenchmarkDotNet
  dependency-version: 0.15.8
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: nuget
- dependency-name: FsCheck.Xunit
  dependency-version: 3.3.2
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nuget
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.4.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nuget
- dependency-name: xunit
  dependency-version: 2.9.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: nuget
- dependency-name: xunit.runner.visualstudio
  dependency-version: 3.1.5
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nuget
...

Signed-off-by: dependabot[bot] <support@github.com>

* Switch tests to Microsoft Testing Platform (MTP) and pin FsCheck.Xunit

- Enable Microsoft Testing Platform runner via UseMicrosoftTestingPlatformRunner
  and TestingPlatformDotnetTestSupport. Produces an executable test host that
  runs natively against MTP instead of routing only through legacy VSTest.
- Pin FsCheck.Xunit to 2.16.6 (last v2). FsCheck 3.x removed the Arb API used
  throughout the 70+ *_Old test files that are already scheduled for rewrite
  as part of the ongoing migration; upgrading ahead of the rewrite would
  require rewriting tests that are about to be deleted.
- Other package bumps from dependabot (Microsoft.NET.Test.Sdk 18.4.0,
  xunit 2.9.3, xunit.runner.visualstudio 3.1.5, BenchmarkDotNet 0.15.8)
  are retained.

Build + all 420 tests green.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: KaliCZ <kalandrapavel@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

src/StrongTypes.Benchmarks/StrongTypes.Benchmarks.csproj

@@ -10,6 +10,6 @@
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\StrongTypes\StrongTypes.csproj" />
-    <PackageReference Include="BenchmarkDotNet" Version="0.13.6" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.15.8" />
   </ItemGroup>
 </Project>

src/StrongTypes.Tests/StrongTypes.Tests.csproj

@@ -1,18 +1,22 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net10.0</TargetFramework>
     <LangVersion>14.0</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <NoWarn>CS1591</NoWarn>
     <IsPackable>false</IsPackable>
+    <OutputType>Exe</OutputType>
+    <UseMicrosoftTestingPlatformRunner>true</UseMicrosoftTestingPlatformRunner>
+    <TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>
+    <GenerateTestingPlatformEntryPoint>false</GenerateTestingPlatformEntryPoint>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="FsCheck.Xunit" Version="2.16.6" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="xunit" Version="2.9.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\StrongTypes\StrongTypes.csproj" />
   </ItemGroup>
-</Project>
+</Project>